That may very well be, HH, but that doesn't have much to do with INeedTheFull90's claims. So, what you are offering us is a red herring.
Now, as anyone who doesn't have their pate in close proximity to their sigmoid colon will know, crews are at their assigned stations during TO and landing. Most of these are not in the "back galley" but next to the exits.
Unless you are on Full90's aircraft which apparently have an assortment of lawn chairs so most of the crew can sit in the "back galley" during TO and landing.